One out of six of the top players in the country for 2013 is from the state that you appear to claim has some sort of talent deficiency.
While his post is a bit ambiguous, I don't read jsloanjr as saying the state has a talent deficiency. If so, he's truly is out of touch for the reasons you state, which have been well publicized.
I think he's saying something a little more insightful -- that playing against a high level of HS talent still leaves room for improvement under the college-level learning experience.
He names, specifically, a couple of areas where even the biggest stars coming out of HS typically have a lot to learn. They're often scorers who aren't called upon to play a lot of defense, let alone sophisticated team defense.
And their scoring ability in HS is outstanding without the finer points (and the necessary equally talented teammates and opponents to learn them) of moving without the ball.
In other words, having a lot of other HS stars in the state and local area is one thing. But in terms of the greater overall high D-1 college talent and mutual learning experience, a rising tide lifts all boats (to coin a phrase).
If jsloanjr has seen enough film of Diamond to offer the defense/moving opinion about her specifically, fine. That's his opinion FWIW. If not, then he's just generalizing, which is OK too.
You're on the scene and we welcome your insights. You needn't be too defensive when people here say things that sound to you like ignorance.
There's plenty of that here, and it rarely stands in the way of expressing an opinion. Nor does it generally stand uncorrected for long.
The point is to enjoy the ride -- the give and take, the information and, lo and behold, the occasional gem of a beautifully articulated opinion that you share.